DITA Open Toolkit

{{Infobox software

| name = DITA Open Toolkit

| logo =

| screenshot =

| caption =

| developer =

| released = {{Start date and age|df=yes|2005|03|03}}

| latest release version = 4.3.1

| latest release date = {{release date|df=yes|2025|03|23}}

| repo = {{URL|https://github.com/dita-ot/dita-ot/}}

| programming language = Java, XSLT, Ant

| genre =

| license = Apache License 2.0

| website = {{URL|https://www.dita-ot.org/}}

}}

DITA Open Toolkit (DITA-OT) is an open-source publishing engine for content authored in the Darwin Information Typing Architecture (DITA).{{cite book|author1=Linton, Jen |author2=Bruski, Kylene|title=Introduction to DITA: A Basic User Guide to the Darwin Information Typing Architecture|year=2006|publisher=Comtech Services|isbn=0-9778634-0-9|pages=225}}

The toolkit's extensible plug-in mechanism allows users to add their own transformations and customize the default output, which includes:{{cite web|title=DITA-OT documentation|url=http://www.dita-ot.org/dev/|accessdate=31 May 2017}}

• Eclipse Help
• HTML5
• Microsoft Compiled HTML Help
• Markdown
• PDF, through XSL-FO
• troff
• XHTML and XHTML with a JavaScript frameset

Originally developed by IBM and released to open source in 2005,{{cite web|title=DITA-OT 1.0 release|url=https://sourceforge.net/projects/dita-ot/files/DITA-OT%20Stable%20Release/dita-ot%201.0.0/|accessdate=10 July 2012}} the distribution packages contain Ant, Apache FOP, Java, Saxon, and Xerces.

Many DITA authoring tools and DITA CMSs integrate the DITA-OT, or parts of it, into their publishing workflows.{{cite web|title=DITA-OT|url=https://www.dita-ot.org/|accessdate=13 July 2019}}

Standalone tools have also been developed to run the DITA-OT via a graphical user interface instead of the command line.